Simulation of tank draining phenomena with the NASA SOLA-VOF code

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Abstract
The NASA SOLA-VOF code is a modified version of the SOLA-VOF computer program, specifically designed to calculate the fluid dynamics involved in baffled and unbaffled tank draining problems. It solves the time dependent finite-difference equations that govern the two-dimensional motions of fluids with a free surface upon which surface tension forces can act. The VOF method of tracking the free surface provides an algorithm by which multivalued free surface calculations with surface tension are easily performed. Calculations can be made in either planar or cylindrical geometries with a variety of boundary conditions. The surface tension boundary condition is modeled by an applied surface pressure and wall adhesion effects are specified by a wall contact angle. Complete descriptions are given of the code structure, of procedures for running and setting up the code, of the variables used and of test problems that show the excellent agreement between the calculations and experiments of tank draining problems. A complete computer listing is included in an appendix.

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